Enhanced 1.5 μm emission from Yb³⁺/Er³⁺ codoped tungsten tellurite glasses for broadband near-infrared optical fiber amplifiers and tunable fiber lasers

Abstract

Strong 1.5 μm emission with full width at half maximum of 64 nm is achieved in 3 mol% Yb2O3 and 1 mol% Er2O3 codoped tungsten tellurite glass. The present glass shows large gain bandwidth (6.78 × 10−26 cm3) and figure of merit (4.06 × 10−23 cm2 s).

Reversible Multi-Mode Optical Modification in Inverse-Opal-Structured WO3: Yb3+, Er3+ Photonic Crystal

“…Therefore, the optimal doping concentration of Yb 3+ in the WO 3 inverse photonic crystal is determined to be 3%. As depicted, when excited by near-infrared light at 980 nm, all samples exhibit green UCL peaks at 525 nm and 552 nm emitted from the Er 3+ 2 H 11/2 / 4 S 3/2 → 4 I 15/2 transition, and the red UCL peaks exhibited at 657 nm and 670 nm are generated by the 4 F 9/2 → 4 I 15/2 transitions of Er 3+ [29][30][31]. In general, the equation I = P n can be used to investigate the UCL mechanism, where I, P, and n are the UCL intensity, the 980 nm laser power, and the number of photons, respectively.…”

Theoretical and experimental investigation of Al3+ ion-suppressed phase-separation structures in rare-earth-doped high-phosphorus silica glasses

“…Normally, the fluorescence lifetime decay curves of Yb 3+ have typical mono-exponential decay characteristics, which have been widely reported for other Er-Yb doped glasses. 51,54 Interestingly, Yb 3+ in the EYP10 and EYPA10 glasses deviates severely from the monoexponential decay properties, and Yb 3+ in the EYP10 glass exhibits tri-exponential decay properties (see Table 1 for detailed data). The simplest and most intuitive explanation for this phenomenon is that Yb 3+ exists in multiple topologies that differ significantly.…”

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

“…Table (1) shows the values of glass composition, molecular weight (g.mol -1 ), density (g.cm 3 ), molar volume (cm Unlike the usual behaver of molar volume with density, the molar volume of the glass samples rises as Er +3 increases however it supposed to have inverse relationship with glass density. The abnormal behaver of molar volume with density is presented in Fig.…”